Initial commit of Firebase Sessions SDK (#10285)

Author: samedson

FirebaseCore/Sources/FIRApp.m

@@ -822,6 +822,7 @@ + (void)registerSwiftComponents {
   // Dictionary of class names that conform to `FIRLibrary` and their user agents. These should only
   // be SDKs that are written in Swift but still visible to ObjC.
   NSDictionary<NSString *, NSString *> *swiftComponents = @{
+    @"FIRSessions" : @"fire-sessions",
     @"FIRFunctionsComponent" : @"fire-fun",
     @"FIRStorageComponent" : @"fire-str",
   };

FirebaseSessions.podspec

@@ -0,0 +1,46 @@
+Pod::Spec.new do |s|
+  s.name             = 'FirebaseSessions'
+  s.version          = '10.0.0'
+  s.summary          = 'Firebase Sessions'
+
+  s.description      = <<-DESC
+  Not for public use.
+  SDK for sending events for Firebase App Quality Sessions.
+                       DESC
+
+  s.homepage         = 'https://firebase.google.com'
+  s.license          = { :type => 'Apache-2.0', :file => 'LICENSE' }
+  s.authors          = 'Google, Inc.'
+
+  s.source           = {
+    :git => 'https://github.com/firebase/firebase-ios-sdk.git',
+    :tag => 'CocoaPods-' + s.version.to_s
+  }
+  s.social_media_url = 'https://twitter.com/Firebase'
+
+  ios_deployment_target = '11.0'
+  osx_deployment_target = '10.13'
+  tvos_deployment_target = '12.0'
+  watchos_deployment_target = '6.0'
+
+  s.swift_version = '5.3'
+
+  s.ios.deployment_target = ios_deployment_target
+  s.osx.deployment_target = osx_deployment_target
+  s.tvos.deployment_target = tvos_deployment_target
+  s.watchos.deployment_target = watchos_deployment_target
+
+  s.cocoapods_version = '>= 1.4.0'
+  s.prefix_header_file = false
+
+  s.source_files = "FirebaseSessions/Sources/**/*.swift"
+
+  s.dependency 'FirebaseCore', '~> 10.0'
+  s.dependency 'FirebaseCoreExtension', '~> 10.0'
+  s.dependency 'FirebaseInstallations', '~> 10.0'
+
+  s.pod_target_xcconfig = {
+    'GCC_C_LANGUAGE_STANDARD' => 'c99',
+    'HEADER_SEARCH_PATHS' => '"${PODS_TARGET_SRCROOT}"'
+  }
+end

FirebaseSessions/Sources/FirebaseSessions.swift

@@ -0,0 +1,54 @@
+// Copyright 2022 Google LLC
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+import Foundation
+import FirebaseCore
+
+// Avoids exposing internal FirebaseCore APIs to Swift users.
+@_implementationOnly import FirebaseCoreExtension
+
+@objc(FIRSessionsProvider)
+protocol SessionsProvider {
+  @objc static func sessions() -> Void
+}
+
+@objc(FIRSessions) class Sessions: NSObject, Library, SessionsProvider {
+  // MARK: - Private Variables
+
+  /// The app associated with all sessions.
+  private let googleAppID: String
+
+  // MARK: - Initializers
+
+  required init(app: FirebaseApp) {
+    googleAppID = app.options.googleAppID
+  }
+
+  // MARK: - Library conformance
+
+  static func componentsToRegister() -> [Component] {
+    return [Component(SessionsProvider.self,
+                      instantiationTiming: .alwaysEager,
+                      dependencies: []) { container, isCacheable in
+        // Sessions SDK only works for the default app
+        guard let app = container.app, app.isDefaultApp else { return nil }
+        isCacheable.pointee = true
+        return self.init(app: app)
+      }]
+  }
+
+  // MARK: - SessionsProvider conformance
+
+  static func sessions() {}
+}